S 308 and other X-ray emitting bubbles around Wolf–Rayet stars

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Table 1

Best-fit values obtained with a double VAPEC model.

Model	constantTBabs(vapec + vapec)
Parameter

Instrumental background factor

Source

N_H (10²² cm⁻²)
kT (keV)
Normalization
kT (keV)
C/C_⊙
N/N_⊙
Normalization

Sky background factor

Statistic	893/877=1.02

Notes. The normalization factors (“factor”) of the instrumental and sky background are also expressed. Normalization is expressed as , where n_e is the electron density of the plasma (cm⁻³), n_H, is the hydrogen density (cm⁻³) and D (cm) is the distance to the source.

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